Assuming none of them were running, nothing to do. They will pick up
the updates next time you start them. (If some were running this would
be a bug in the Update GUI, and worth reporting.)
If any disposables based on default-dvm were running, then they wont be
updated, and you cant restart them like a normal qube. Take whatever
action is consistent with your threat model.
I never presume to speak for the Qubes team.
When I comment in the Forum I speak for myself.